I have a 2 year old GSD named Max. I rescued him from my receptionist who kept him locked in a shed for 14 hours a day when he was just 4 months old. Long story short Max is very fearful and reactive because of this. I brought him home and immediately began training. We did the petsmart training and that did not work. I hired a K9 trainer and we did the board and train for a month. I think the board and train made it worse. Max has nip at over 8 people unprovoked. Now when ever he hears the door he bites the first thing he sees whether is a pillow or me(2 times). I hired a behaviorist and we worked on control and getting him to stay in place and he is great on a leash but off the leash he is horrible. He ran out the house and bit my neighbor, she called animal control. It was a mess. I have a 9 month old daughter and I am scared to death that if she is near him when the bell rings he will bite her.( yes i tell everyone i know to call before but that is not always the case) I tried to find home but when the person interested in him came over, he nip him as well.. any advise is a appreciated.